LunaTuna

What LunaTuna is

LunaTuna is a chromatic tuner for iPhone and iPad, and for compatible Macs with an M1 or newer chip. The free version provides chromatic tuning without ads, and the maker describes the app as about 1 MB. It can tune instruments including violin, cello, bass, kalimba, ukulele, and saxophone, as well as guitar. Users can change the 440 Hz reference frequency. The optional Extension Pack adds common and custom tunings, transposition, an in-tune precision setting, 14 additional color ways, dark mode support, and alternate temperaments; it is listed at $2.99, paid once. Compatibility is listed for iPhone and iPad on iOS or iPadOS 14 or later, and Mac on macOS 11 or later with an M1 chip or later. Bass cut is on by default, so the maker advises turning it off for C#2 or lower; the extension automatically ignores it for tunings with low notes. The maker recommends a quiet environment because noise makes pitch detection harder, and placing the microphone close to low-output instruments, especially for low notes.